Imports System
Imports System.Drawing
Imports System.IO
Imports System.Drawing.Printing
Imports System.Windows.Forms

Public Class Form1
    Inherits Form
    Private printButton As Button

    Private printDocument1 As New PrintDocument()
    Private stringToPrint As String

    Public Sub New() 
        Me.printButton = New System.Windows.Forms.Button()
        Me.printButton.Location = New System.Drawing.Point(12, 51)
        Me.printButton.Size = New System.Drawing.Size(75, 23)
        Me.printButton.Text = "Print"
        Me.ClientSize = New System.Drawing.Size(292, 266)
    End Sub

    Private Sub ReadFile() 
        Dim docName As String = "testPage.txt"
        Dim docPath As String = "c:\"
        printDocument1.DocumentName = docName
        Dim stream As New FileStream(docPath + docName, FileMode.Open)
        Try
            Dim reader As New StreamReader(stream)
            Try
                stringToPrint = reader.ReadToEnd()
            Finally
                reader.Dispose()
            End Try
        Finally
            stream.Dispose()
        End Try
    End Sub

    Private Sub printDocument1_PrintPage(ByVal sender As Object, _
        ByVal e As PrintPageEventArgs)

        Dim charactersOnPage As Integer = 0
        Dim linesPerPage As Integer = 0

        ' Sets the value of charactersOnPage to the number of characters 
        ' of stringToPrint that will fit within the bounds of the page.
        e.Graphics.MeasureString(stringToPrint, Me.Font, e.MarginBounds.Size, _
            StringFormat.GenericTypographic, charactersOnPage, linesPerPage)

        ' Draws the string within the bounds of the page
        e.Graphics.DrawString(stringToPrint, Me.Font, Brushes.Black, _
            e.MarginBounds, StringFormat.GenericTypographic)

        ' Remove the portion of the string that has been printed.
        stringToPrint = stringToPrint.Substring(charactersOnPage)

        ' Check to see if more pages are to be printed.
        e.HasMorePages = stringToPrint.Length > 0

    End Sub

    Private Sub printButton_Click(ByVal sender As Object, ByVal e As EventArgs) 
        ReadFile()
        printDocument1.Print()
    End Sub


    <STAThread()>  _
    Shared Sub Main() 
        Application.EnableVisualStyles()
        Application.SetCompatibleTextRenderingDefault(False)
        Application.Run(New Form1())
    End Sub
End Class

using System;
using System.Drawing;
using System.IO;
using System.Drawing.Printing;
using System.Windows.Forms;

namespace PrintApp
{
    public class Form1 : Form
    {
        private Button printButton;
        private PrintDocument printDocument1 = new PrintDocument();
        private string stringToPrint;
        public Form1()
        {
            this.printButton = new System.Windows.Forms.Button();
            this.printButton.Location = new System.Drawing.Point(12, 51);
            this.printButton.Size = new System.Drawing.Size(75, 23);
            this.printButton.Text = "Print";
            this.printButton.Click += new System.EventHandler(this.printButton_Click);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.printButton);

            // Associate the PrintPage event handler with the PrintPage event.
            printDocument1.PrintPage +=
                new PrintPageEventHandler(printDocument1_PrintPage);
        }

        private void ReadFile()
        {
            string docName = "testPage.txt";
            string docPath = @"c:\";
            printDocument1.DocumentName = docName;
            using (FileStream stream = new FileStream(docPath + docName, FileMode.Open))
            using (StreamReader reader = new StreamReader(stream))
            {
                stringToPrint = reader.ReadToEnd();
            }
        }

        private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
        {
            int charactersOnPage = 0;
            int linesPerPage = 0;

            // Sets the value of charactersOnPage to the number of characters 
            // of stringToPrint that will fit within the bounds of the page.
            e.Graphics.MeasureString(stringToPrint, this.Font,
                e.MarginBounds.Size, StringFormat.GenericTypographic,
                out charactersOnPage, out linesPerPage);

            // Draws the string within the bounds of the page
            e.Graphics.DrawString(stringToPrint, this.Font, Brushes.Black,
                e.MarginBounds, StringFormat.GenericTypographic);

            // Remove the portion of the string that has been printed.
            stringToPrint = stringToPrint.Substring(charactersOnPage);

            // Check to see if more pages are to be printed.
            e.HasMorePages = (stringToPrint.Length > 0);
        }

        private void printButton_Click(object sender, EventArgs e)
        {
            ReadFile();
            printDocument1.Print();
        }

        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}